Manufacture of files.



w. H. DEVNLEY/B. MAKIN & B. DENLEY. MANUFACTURE OF FILES.

APPLICATION FILED SEPT. 26, I9I3.

1,165,231; I I Patented De0'.21,1915\ III Iii

I II III Arm/wt Y ed with files of d fferent lengths.

lls-ha YP' JELLIAM HENRY DENLEY, OE BIRMINGHAM, BENJAMIN MARIN, OF SHEEFIELD, 3,1:6

HENRY BERNARD DENLEY, OF BIRMINGHAM, ENGLAND.

MANUFACTURE or FILES.

Specification of Letters Patent. Patented Dec, 21, 1%?5.

Application filed September 26, 1913. Serial No. 791,962.

To all whom it may concern:

Be it known that we, WILLIAM I'IENRY Dunner, BENJAMIN Martin, and HENRY Binznnno DENLE'Y, subjects of theKing of Great Britain, residing at 378 Moseley road, Birmingham, England, Atterclitle Steel orks, Sheilicld, England, and 378 Moseley road, Birmingham, England, respectively, have invented a new. and useful Manufacture of Files; and we do hereby declare the following to be a full, clear, and exact description of the same.

Our invention comprises improvements in the manufacture of files, and has for its object to provide a cheap and eilicient means whereby a number of files oi the type which are provided with milling teeth are produced at one operation,- or during one movement of the machine.

Referring to the accompanying drawings forminga part hereof: Figure 1 represents one form of milling cutter in position in the slide of a milling machine.' Figs. 2, 3, and lrepresent modified forms of the cutters suitable for use according to this invention.

In carrying our invention into practice as illustrated upon the accompanying drawings we secure the file blanks, l by any suitable means to the slide 2,0r an attachment which may be secured to the slide of the milling machine, which is automatically advanced against the milling cutter. The milling-tool 3 is carried by the usual spindle i and is of a length corresponding .with the length of the die to be milled. The pitch of the teeth 5 on the cutter corresponds with the pitch of the file when out. The cutter is provided with the usual clearance grooves (5 in inclined or spiral relation to the cutter, and each tooth is backed off with suitable clearance. It will be obvious from this that it the slide and cutter move relatively to the required extent the whole series of blanks willbe milled during the one movement and without re' quiring re-settingi. In forming the clearance grooves the milled blanks are set up again in similar manner and passed beneath another cutter of suitable shape which mills the clearance grooves of the whole series of files at one operation andsetting.

T he cutters may be made in one long length corresponding with the length of the file-or they may be built in several sec tional lengths to enable them to be employ- The out ter is preferably composed of sections so that if, one part of thecutter'is damaged only part of same need to be replaced. If it is desired to mill longer files a section of a suitable length is added.

A modified form ofcutter is shown at.

Figs. 2 and 3. According to this modified tion instead of forming the cutter teeth directly upon a cylindrical member or body, the cylindrical member is grooved spirally,

blades 8 having upon their outer edges 2. series of cutter teeth '9. The blades are ,in the form of a long strip one edge of which fits within the grooves 7 while the other and outer edge is backed off, and a row of-teeth is cut thereon for the full length of the blade. The front face of the groove is preferably radial in relation to the center of the body, but the rear face may be'inclined as at 10, Fig. 4 so that the groove is tapered having a greater width at the periphery than at the bottom of the groove. The blade has a Width corresponding with the width of the bottom of the groove, and into the groove at the back of the blade a long wedge 11 or number. of short .wedges fit, these Wedges being adapted to be forced into engagement files which have a straight or flat surface, 95

forv the blades may bereadily manufactured of this curved form. Any suitablenumber of these blades may be employed in each cutter, ten or twelve being a convenient number.

By our invention we are enabled to set up 100 a number of files at one setting for milling and thereby materially reduce the cost of production.

What We claim then is rality of file blanks are adapted to be se cured; -and a cutter rotatably supported above the same and having a plurality of 11a and into said grooves? We secure cutter w If desired the rear edge of the spirally arranged rows of relieved teeth adapted to cut. a plurality of correspondingly shaped parallel grooves in the blanks, the number of teeth operative in each row being equal to the number of said grooves.

2. 111a cutter for the manufacture of files, the combination of a blade of spiral form; and a plurality of cutting teeth upon said blade and inclined thereto so as to cut in iependent grooves of the full depth of the teeth When the blade is rotated about the aXis of the spiral and traversed at right angles to the said axis.

3. In a cutter for the manufacture of files, the combination of a spindle provided With a plurality of spiral groves; a plurality of spiral blades adapted'to fit in said groves; a plurality of cutting teeth upon each of said blades and inclined thereto so as to cut independent grooves of the full depth of the teeth when the blade is rotated about the axis, of the. spiral and traversed at-right angles to the said axis; a plurality of spiral Wedges adapted to retain said blades in said grooves; and a plurality of screws adapted to tighten said Wedges into position.

4. In a cutter for the manufacture of files, the combination of a spindle provided with a plurality of spiral grooves; a plurality of spiral blades adapted to fit in said grooves;

a plurality of cutting teeth upon each of said blades and inclined thereto so as to be parallel with a plane perpendicular to'the axis of rotation of the cutter and to out independent grooves of the full depth of the teeth when the blade is rotated about the axis of the spiral; a plurality of spiral wedges adapted to retain said blades in said grooves; and a plurality of screws adapted to tighten said wedges into positlon.

5. In a cutter for theinanufacture of flies, the combination of a blade of spiral form 5 and a plurality of cutting teeth upon said blade and inclined thereto so as to bepar-t A WILLIAM HENRY DENLEY BENJAMIN MAKI'N. HENRY BERNARD DENLEY.

Witnesses:

HAROLD J. G. Fonnns'rnn, EVAN L. W. BYRNE. 

